Bibcode
Uytterhoeven, K.; Kurtz, D. W.; Niemczura, E.; Grigahcène, A.; Murphy, Simon J.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society, Volume 427, Issue 2, pp. 1418-1428.
Advertised on:
12
2012
Citations
26
Refereed citations
23
Description
KIC 3429637 (HD 178875) is a δ Sct star whose light curve shows
continuous pulsational amplitude growth in Kepler mission photometry.
Analysis of the three largest amplitude peaks in the Fourier transform
indicates different growth rates for all three. We have ruled out
instrumental causes, and determine the amplitude growth to be intrinsic
to the star. We calculate time-dependent convection models and compare
them with the observations. We confirm earlier characterizations that
KIC 3429637 is a marginal Am star through the analysis of new
spectroscopic data. With the data presently available, a plausible cause
of the amplitude growth is increasing pulsational driving as
evolutionary changes shift the He II driving zone deeper in this ρ
Puppis star. If this model is correct, then we are watching real-time
stellar evolutionary changes.
Related projects
Helio and Astero-Seismology and Exoplanets Search
The principal objectives of this project are: 1) to study the structure and dynamics of the solar interior, 2) to extend this study to other stars, 3) to search for extrasolar planets using photometric methods (primarily by transits of their host stars) and their characterization (using radial velocity information) and 4) the study of the planetary
Savita
Mathur